Forget Protestant or Catholic - the largest religious group in the current Democrat coalition is "none," according to the latest survey from Pew Forum.

The general survey of the spiritual faith of Americans was conducted by interviewing 35,071 adults on landlines and cellphones between June and September 2014 but just released now.

The poll found that 46% of Americans experience a deep sense of "wonder about the universe" at least once a week and belief in God ranged from a low of 80% among younger Americans to 92% among older Americans. But among those describing themselves as Democrats, 28% said they identified as the "unaffiliated" meaning atheists, agnostics and those with no religious affiliation. That is an increase from just 19% of Democrats identifying that way in 2007.

The second biggest group for Democrats were those identifying as Catholic at 21% and Evangelical at 16%.

Among Republicans those who identified at "unaffiliated" stood at just 14%, half of the Democratic level. The largest religious group among Republicans was Evangelical Protestant at 38% followed by Catholic at 21%, the same level at the Democrats.